LCD display having increased contrast structure, and display device

Abstract

The present invention relates to the field of display, and in particular to an LCD display having an increased contrast structure, comprising: a backlight layer ( 1 ), a backlight control layer ( 2 ), and a light display layer ( 3 ). The backlight layer ( 1 ), the backlight control layer ( 2 ), and the light display layer ( 3 ) are successively connected; the backlight layer ( 1 ) is configured to emit a light source; the backlight control layer ( 2 ) filters the light source emitted by the backlight layer ( 1 ); the light display layer ( 3 ) is provided with a light display surface ( 305 ), and the light display surface ( 305 ) displays visible light filtered by the backlight control layer ( 2 ).

What is claimed is: 
     
       1. A liquid crystal display (LCD) display having a structure for increasing contrast, comprising:
 a backlight layer configured to emit light; 
 a backlight control layer configured to filter the light emitted by the backlight layer; and 
 a light display layer provided with a light display surface for displaying visible light filtered by the backlight control layer; 
 wherein the backlight layer, the backlight control layer, and the light display layer are connected sequentially; 
 wherein the backlight control layer comprises a first glass substrate, the first glass substrate comprises a first lower glass substrate and a first upper glass substrate stacked with the first lower glass substrate; 
 wherein the light display layer comprises a second polarizer connected to the first upper glass substrate and configured to filter the light passing through the first upper glass substrate; 
 wherein the light display layer comprises a second glass substrate stacked with the second polarizer, the second glass substrate comprises a second upper glass substrate; and a second lower glass substrate stacked with the second upper glass substrate and connected to the second polarizer; 
 wherein by disposing the backlight control layer between the backlight layer and the light display layer, the backlight control layer is configured to perform a pixel-level filtering control on a transmission of the light, so as to block the light of a black area of the light display layer, such that the light reaching the light display layer is prevented from passing through the light display surface, the light passing through the first lower glass substrate is twisted, and an area defined by a twisted light and a polarization direction of the second polarizer is a dark area of a picture; 
 wherein a pixel point structure for controlling one or more light pixels is provided in the first upper glass substrate, the pixel point structure is one or more control pixels that constitute a smallest unit of the backlight control layer, the light display layer further comprises a grid layer for preventing pixels from mixing colors and disposed within the second upper glass substrate, and the grid layer is a black grid; 
 wherein the backlight control layer is configured as a dual LCD overlay structure, with the lower LCD layer serving as the backlight control layer to perform pixel-level control on transmission of light rays, blocking the backlight in dark areas of the light display layer to a minimum brightness, while the upper LCD layer is configured as the light display layer to operate pixels, allowing light in bright areas to pass; 
 wherein the first glass substrate comprises a first lower glass substrate and a first upper glass substrate, with a liquid crystal layer disposed between them, and the polarization angle of the light can be twisted by the liquid crystal layer; 
 wherein the light display layer further comprises a third polarizer for displaying visible light, and the second upper glass substrate is a color filter, while the second lower glass substrate is an array of thin-film field effect transistors. 
 
     
     
       2. The LCD display of  claim 1 , wherein
 the backlight control layer comprises: a first polarizer connected to the backlight layer and configured to convert the light emitted by the backlight layer into polarized light; and a first glass substrate stacked with the first polarizer and connected to the light display layer; and 
 a liquid crystal layer is disposed between the first lower glass substrate and the first upper glass substrate, and the liquid crystal layer twists a polarization angle of the polarized light; and 
 the first lower glass substrate is connected to the first polarizer, and the first upper glass substrate is connected to the light display layer. 
 
     
     
       3. The LCD display of  claim 2 , wherein a pixel point structure for controlling one or more light pixels is provided within the first upper glass substrate. 
     
     
       4. The LCD display of  claim 1 , wherein the backlight control layer is a backlight control liquid crystal cell. 
     
     
       5. The LCD display of  claim 1 , wherein the light display layer is a display liquid crystal cell. 
     
     
       6. A display device, comprising: a liquid crystal display (LCD) display having a structure for increasing contrast, wherein the LCD display comprises:
 a backlight layer configured to emit light; 
 a backlight control layer configured to filter the light emitted by the backlight layer; and 
 a light display layer provided with a light display surface for displaying visible light filtered by the backlight control layer; 
 wherein the backlight layer, the backlight control layer, and the light display layer are connected sequentially; 
 wherein the backlight control layer comprises a first glass substrate, the first glass substrate comprises a first lower glass substrate and a first upper glass substrate stacked with the first lower glass substrate; 
 wherein the light display layer comprises a second polarizer connected to the first upper glass substrate and configured to filter the light passing through the first upper glass substrate; 
 wherein the light display layer comprises a second glass substrate stacked with the second polarizer, the second glass substrate comprises a second upper glass substrate; and a second lower glass substrate stacked with the second upper glass substrate and connected to the second polarizer; 
 wherein by disposing the backlight control layer between the backlight layer and the light display layer, the backlight control layer is configured to perform a pixel-level filtering control on a transmission of the light, so as to block the light of a black area of the light display layer, such that the light reaching the light display layer is prevented from passing through the light display surface, the light passing through the first lower glass substrate is twisted, and an area defined by a twisted light and a polarization direction of the second polarizer is a dark area of a picture; 
 wherein a pixel point structure for controlling one or more light pixels is provided in the first upper glass substrate, the pixel point structure is one or more control pixels that constitute a smallest unit of the backlight control layer, the light display layer further comprises a grid layer for preventing pixels from mixing colors and disposed within the second upper glass substrate, and the grid layer is a black grid; 
 wherein the backlight control layer is configured as a dual LCD overlay structure, with the lower LCD layer serving as the backlight control layer to perform pixel-level control on transmission of light rays, blocking the backlight in dark areas of the light display layer to a minimum brightness, while the upper LCD layer is configured as the light display layer to operate pixels, allowing light in bright areas to pass; 
 wherein the first glass substrate comprises a first lower glass substrate and a first upper glass substrate, with a liquid crystal layer disposed between them, and the polarization angle of the light can be twisted by the liquid crystal layer; 
 wherein the light display layer further comprises a third polarizer for displaying visible light, and the second upper glass substrate is a color filter, while the second lower glass substrate is an array of thin-film field effect transistors. 
 
     
     
       7. The display device of  claim 6 , wherein
 the backlight control layer comprises: a first polarizer connected to the backlight layer and configured to convert the light emitted by the backlight layer into polarized light; and a first glass substrate stacked with the first polarizer and connected to the light display layer; 
 a liquid crystal layer is disposed between the first lower glass substrate and the first upper glass substrate, and the liquid crystal layer twists a polarization angle of the polarized light; and 
 the first lower glass substrate is connected to the first polarizer, and the first upper glass substrate is connected to the light display layer. 
 
     
     
       8. The display device of  claim 7 , wherein a pixel point structure for controlling one or more light pixels is provided within the first upper glass substrate. 
     
     
       9. The display device of  claim 6 , wherein the backlight control layer is a backlight control liquid crystal cell. 
     
     
       10. The display device of  claim 6 , wherein the light display layer is a display liquid crystal cell.